package com.sakura.takeaway.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.sakura.takeaway.common.R;
import com.sakura.takeaway.entity.Employee;
import com.sakura.takeaway.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;

/**
 * @author Sakura
 * @Date 2022-07-08 9:45
 */

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录：进行MD5加密-->根据用户名username查询数据库-->密码对比是否一致-->查看员工状态status-->
     *          登录成功，将员工id放入session返回登录结果
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){
        //1.将提交的密码进行MD5加密
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2.根据用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //3.没有查询到返回失败的结果
        if(emp==null){
            return R.error("登录失败");
        }

        //4.密码对比是否一致,不一致返回失败的结果
        if(!emp.getPassword().equals(password)){
            return R.error("登录失败");
        }

        //5.查看员工状态status,如果已经被禁用，返回已禁用的结果
        if(emp.getStatus()==0){
            return R.error("员工已禁用");
        }

        //6.登录成功，将员工id放入session返回登录结果
       request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);
    }

    /**
     * 员工退出：清理session中保存的登录的员工id
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        //清理session中保存的当前登录的员工id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 新增员工
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request,@RequestBody Employee employee){
        log.info("新增员工，员工信息：{}",employee.toString());

        //设置初始化密码123456，需要进行MD5加密
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        //优化，使用MyBatisPlus自动填充字段  --> MyMetaObjectHandler
        /**
        //设置创建和修改的时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //获取当前登录用户的id
        Long empId =(Long) request.getSession().getAttribute("employee");
        //设置创建和修改的员工的id
        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);
         */

        //解决异常: Duplicate entry 'zhangsan' for key 'idx_username'
        employeeService.save(employee);

        return R.success("新增员工成功");
    }

    /**
     * 员工信息分页查询  --> 配置MyBatisPlus的分页插件 --> MyBatisPlusConfig
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){

        log.info("page={},pageSize={},name={}",page,pageSize,name);

        //构造分页条件
        Page pageInfo=new Page(page,pageSize);

        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper =new LambdaQueryWrapper<>();
        //条件过滤条件
        queryWrapper.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        //执行查询
        employeeService.page(pageInfo,queryWrapper);

        return R.success(pageInfo);
    }

    /**
     * 根据员工id修改信息：编辑、禁用  --> 拓展mvc框架的信息转换器 将json转换为string --> WebMvcConfig
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
        log.info(employee.toString());

        //获取当前线程id
//        long id = Thread.currentThread().getId();
//        log.info("当前线程id:{}",id);

        //优化，使用MyBatisPlus自动填充字段  --> MyMetaObjectHandler
        /**
        Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setUpdateUser(empId);
        employee.setUpdateTime(LocalDateTime.now());
         */

        employeeService.updateById(employee);

        return R.success("员工信息修改成功");
    }

    /**
     *根据id查询员工信息   --> 修改员工信息回显
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据id查询员工信息...");

        Employee employee = employeeService.getById(id);
        if(employee != null){
            return R.success(employee);
        }
        return R.error("没有查询到对应的员工信息...");
    }
}
